Engine truck



Nov. 10, 1931.

E. M. SHANNON ENGINE TRUCK Filed June 18, 1930 4 Sheets-Sheet l E. M. SHANNON ENGINE TRUCK Nov. 10, 1931.

Filed June 18, 1930 4 Sheets-Sheet 2 Nov. 10, 1931 E'. M. SHANNON 1,831,722

ENGINE TRUCK F iled June 18, 1950 4 Sheets-Sheet s Nov. 10, 1931 M. SHANNON ENGINE TRUCK Filed June ,18, 1950 4 Sheets-Sheet 4 Patented Nov. 10, 1931 UNITED STATES ELLWOOD SHANNON, OF BALA, PENNSYLVANIA ENGINE TRUCK Application filed June 18,

My invention relates to certain improvements in four-wheel trucks in which the frame of the truck is made as an integral casting and has a rectangular central memher wlth pedestal extensions at each corner,

and this particular form of truck is illustrated and claimed in a separate application filed by me on the 18th day of June, 1930, under Serial No. 462,011.

The object of this invention is to construct a truck having a frame of the abovementioned type with longitudinal equalizing mechanism for the axles of the truck, the longitudinalmechanism including the longitudinally arranged semi-elliptical spring at each side of the truck.

The invention also relates to certain improvements in the details of construction of the truck, which will be fully described hereinafter.

In the accompanying drawings Fig. 1 is a side view of a four-wheel truck illustrating my improvements Fig. 2 is a plan view;

Fig. 3 is a longitudinal sectional view on the line 3-3, Fig. 2;

Fig. 4 is a transverse sectional view on the line 4- 1, Fig. 2;

Fig. 5 is a transverse sectional View on 80 the line 5 5, Fig. 2;

Fig. 6 is a transverse sectional viewon the line 6-6, Fig. 2;

. Fig. 7 is a longitudinal sectional view through the side of a truck showing the equalizing gear in full lines and showing ordinary boxes with the bearing blocks rest ing directly on the axle; and

Figs. 8 and 9 are views of modifications of the journal box.

Referring to the drawings, 1 is the frame of the truck made, in the present instance, as an integral casting and consisting of an open rectangular central portion having sides 22 and cross members 3--3, and at each corner of the truck are pedestal extensions 4 in which are mounted the boxes 5 of the axle 6. Each of the side members 2 of the frame is in the form of an inverted channel and is preferably solid on top and has at its center a recessed seat 7 for a semi-elliptic the free movement of the links.

1930. Serial No. 462,012.

spring 8, which is located within the side members as shown in Figs. 4, 6 and 7. Each extension is formed with .two arms 99 spaced apart for the reception of the equalizing beam 10, andthese arms are connected by the pedestal members 11, in which are mounted the boxes 5. The equalizing beams 10 rest on the boxes as shown in Fig. 4 and one arm of eachbeam is connected to one end of the spring 8 by a link 12, which has 30 a key 13 for carrying a sprin seat 14 of v the usual construction. Suspen ed from the outer arm of each equalizing beam 10 is a- 7 shown at 22, the flanges extending over the edge of the bolster as show in Fig. 3. The 7 center plate is secured to the bolster by bolts in the present instance.

At the lower end of the bolster are bearings 23 connected by a semi-circular web 24, and

extending through the bearings are pivot bars 30 i 25 suspended by links 26. Each link is hung from two pins 27 carried by the transverse members 3 of the main frame. The transverse members have openings, 28'therein for This form 5 of link is known as a three-point suspension link. Other forms of links may be used without departing from the essential features of the invention.

Projecting inwardly from the transverse members 3 are ledges 29 which underlap the flanges 22 of the center hearing which is secured to the bolsterl These flanges act as stops for the bolster in the event of any of the parts breaking. The webs 24 of the bearings 23 of the bolster are keyed to the bars 25 by key plates 30 shown in Figs. 1 and6 and in each end of each bar 25 is a key 31 holding the links against longitudinal movement. The form of journal boxes shown in Figs. 2 and 5 of the drawings is of tubular construction and extends from one side of the truck to the other and encloses the axle 6. Each end of this tubular journal box is enlarged at 32, and in the enlarged portions are rol er-bearings 33 of any suitable type. The roller-bearings are held in place by a cap plate 34 secured to the end of the elongated journal box. The cap plates close the ends of the,

journal box. This construction permits the use of a lubricant forthe roller-bearings.

In Fig. 7 the ordinary axle box 5a is shown, having a bearing block 35 resting upon the axle 6. In this view the equalizing mechanism is shown in full lines and is similar to that shown in Fig. 1. Figs. 8 and 9 illustrate another form of journal box which may be substituted for the journal box shown in Fig. 4 or in Fig. 7. In the box 56 is a cylindrical bushing 36 and within the cylindrical bushing is a floating bushing 37 which is free to rotate independently of the axle 6.

I claim:

1. The combination in a four-wheel truck, of a main frame made as an integral casting and having a rectangular central member consisting of hollow side sections and transverse sections, said transverse sections having openings therein for suspension links; extensions at the corners of said rectangular portion of the frame, each extension consisting of two arms spaced apart and connected by pedestals the space between the arms being open at the top; an axle box between the pedestals of each extension; a longitudinally arranged semi-elli tic spring in each hollow side section; equa izing beams resting upon the journal boxes and located between the arms of the extensions; links connecting one end of each spring with one end of an equalizing beam; and a coiled spring connected to x the other end of said beam and located beyond the boxes.

2. The combination in a four-wheel truck, of a frame made as an integral casting and having transverse members and side members, forming an open central section, each of said transverse members being made in two parts spaced apart to form openings; links mounted in the openings and two ins extending across the openings and from w ich each link is suspended; bars connecting each pair of links; a bolster mounted in the opening in the frame and having depending bearings mounted on the bars between the links; inverted U-shaped webs connecting the bearings; key plates securing the bars to the webs; and a center bearing on the bolster.

3. The combination in a four-wheeled truck, of a frame having transverse members and side members, forming an open central section, each of said transverse members being made in two parts s aced apart to form openings; links suspen ed from the frame and mounted in the openings; bars connecting bolster.

ELLWOOD M. SHANNON. 

